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Circular dichroism spectra of ChTg and rChTg. CD spectra of native ChTg (1.3 µM) (black line); rChTg (1.3 µM) in 0.2 M urea (blue line) and rChTg (1.3 µM) in 8 M urea (red line). CD spectra were recorded at pH 5.0, 25 °C. The spectrum of rChTg in 8 M urea cannot be extended below 218 nm due to the interference of 8 M urea.
